CN102089161A - Bearing device for axle - Google Patents

Bearing device for axle Download PDF

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Publication number
CN102089161A
CN102089161A CN2009801268325A CN200980126832A CN102089161A CN 102089161 A CN102089161 A CN 102089161A CN 2009801268325 A CN2009801268325 A CN 2009801268325A CN 200980126832 A CN200980126832 A CN 200980126832A CN 102089161 A CN102089161 A CN 102089161A
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CN
China
Prior art keywords
outer ring
inner ring
electric conductor
hermetic unit
core metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2009801268325A
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Chinese (zh)
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CN102089161B (en
Inventor
高丽丰
古泽重明
古川圭一
井上茂
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JTEKT Corp
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JTEKT Corp
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Publication date
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Priority to CN201410123001.5A priority Critical patent/CN103963567B/en
Publication of CN102089161A publication Critical patent/CN102089161A/en
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Publication of CN102089161B publication Critical patent/CN102089161B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/001—Hubs with roller-bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/002—Conductive elements, e.g. to prevent static electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • F16C2202/32—Conductivity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Abstract

A bearing device adapted for use in an axle and having a bearing section using a fluorine seal for a seal section, wherein electricity is reliably conducted between an outer ring and an inner ring even if a space between the bearing section and a hub shaft is insufficient. A bearing device for an axle is provided with an inner ring (11), an outer ring (12), rolling bodies (13) interposed between the inner ring (11) and the outer rings (12), and a bearing section (10) mounted to a hub shaft (2) with seal sections (20a, 20b) respectively mounted to annular openings formed between the inner ring (11) and the outer ring (12). The seal sections (20a, 20b) each comprise a slinger, a core, and a non-electrically-conductive seal provided between the slinger and the core. The seal section (20b) is provided with an electrically conductive body (24) for electrically interconnecting the outer ring (12) and the inner ring (11).

Description

The Axle bearing system
Technical field
The present invention relates to the Axle bearing system, and more specifically relate to the Axle bearing system that comprises the device that is used for release electrostatic, described static is stored in the outer ring that is installed to the bearing portions on the hub spindle.
Background technology
Axle bearing system at the running vehicle wheel that is used for keeping power actuated vehicle, for example such situation may take place, wherein be stored in the outer ring, therefore cause repeat the intermittence of spark owing to the electric potential difference that generates between inner ring that is installed to the intrasystem bearing portions of Axle bearing and outer ring causes static.Because such spark acts on the radio that is installed in the vehicle and the electronic machine as electrical noise and has a strong impact on them, so between inner ring and outer ring, produced conduction state, make inner ring and outer ring be in identical electromotive force, to discharge the static of being stored.
In the Axle bearing system of the routine of this type, exist and have the Axle bearing system of the sealing arrangement that forms by a plurality of annular elements, described annular element is installed between two members of relative to each other rotation, with with the inner sealing of Axle bearing system and separate with its outside, and in described Axle bearing system, fit together with seal ring and by the wire loop that conductive material forms, and form the hollow space that surrounds by these members, make the conduction grease be sealed between two members, to provide conduction state (for example, refer to Patent Document 1), in described seal ring, the sealing lip of being made by conductive rubber is formed on the reinforcement circle of being made by conductive material.
The correlation technique document
Patent documentation
Patent documentation 1:JP-UM-A-6-80956 (the 2nd page, Fig. 1)
Summary of the invention
The problem that the present invention solves
In the bearing arrangement of patent documentation 1, by guaranteed the electric conductivity between external member (outer ring) and the inner member (inner ring) by conductive rubber and the seal ring made of conduction grease.
It is subsidiary that what mention is that the bearing portions of Axle bearing system trends towards easily being heated to high temperature.Especially, that make by rubber component and be positioned at by the conductive seal ring in oil seal washer and the core metal area surrounded or annular resilient seal part (below, these usually be called fill sealing member) and weakened by heat.Therefore, there are the following problems, promptly is heated to when surpassing 150 ℃ temperature when described filling sealing member, and its sealing function reduces.
In order to solve such problem, existence will have the situation that splendid stable on heating viton is used to fill sealing member.Yet,, can not between outer ring and inner ring, provide conduction state by such fluorine sealing member because the filling sealing member of being made by viton (being called the fluorine sealing member hereinafter) does not have conducting function.Therefore, separate with the fluorine sealing member, reequip conduction dust seal etc. between bearing portions and hub spindle, making provides conduction state by the conduction dust seal between outer ring and inner ring.
Yet it is trouble that such a conduction dust seal is installed.When can not guaranteeing in the situation in sufficient space the conduction dust seal to be installed between bearing portions and the hub spindle, and therefore can not guarantee electric conductivity between outer ring and the inner ring.
In this case, have electric conductivity and splendid stable on heating acrylic resin as filling sealing member though can consider to use, but because described acrylic resin weakened by water, so it can not use in being used for the bearing arrangement of vehicle the power actuated vehicle that is rushed to easily of muddy water in motion for example.
Made the present invention with head it off, and the purpose of this invention is to provide the outer ring that can guarantee bearing portions and the Axle bearing system of the electric conductivity between the inner ring, also in hermetic unit, do not use the fluorine sealing member in the mode of guaranteeing even wherein between bearing portions and hub spindle, provide in the situation of sufficient room.
The means of dealing with problems
According to the invention provides the Axle bearing system, comprising: inner ring; Outer ring, described outer ring have formed annular opening portion between inner ring and outer ring; Be inserted in a plurality of rolling elements between inner ring and the outer ring; By be arranged on oil seal washer in the annular opening part, be arranged on the core metal in the annular opening part and be arranged on oil seal washer and core metal between the hermetic unit that forms of non-conductive sealing member; With the electric conductor that is arranged in the hermetic unit, so that the conduction state between outer ring and the inner ring to be provided.
Electric conductor forms cylinder form substantially, and a side of electric conductor is attached to the core metal of hermetic unit, and the opposite side of electric conductor forms the contact hub spindle.Alternatively, electric conductor forms annular arrangement shape substantially, and the radially inner side of electric conductor is attached to the oil seal washer of hermetic unit, and the radial outside of electric conductor forms the core metal or the outer ring of contact seal part.
Axle bearing system arranged according to the present invention, described Axle bearing system comprises the bearing portions that is installed on the hub spindle, and comprise inner ring, outer ring and be inserted in inner ring and the outer ring between a plurality of rolling elements, and hermetic unit is attached on the described bearing portions, each is formed described hermetic unit by the non-conductive sealing member that is installed in oil seal washer, the core metal in the annular opening space that is formed between inner ring and the outer ring and be arranged on therebetween, wherein annular electric conductor is installed in hub spindle and is installed on the axle drive shaft on it, makes the outer ring of electric conductor contact bearing part.
Advantage of the present invention
According to the present invention, in the hermetic unit of bearing portions with non-conductive sealing member, by making inner ring and outer ring be in identical potential level static is discharged, with by providing conduction state to guarantee identical electromotive force between outer ring and the inner ring between outer ring and the inner ring in of hermetic unit or in that annular electric conductor is set on the axle drive shaft.Therefore, the electric conductivity between outer ring and the inner ring can easily and in the mode of guaranteeing be guaranteed with simple structure.In addition, the corrosion of the assembled portion between assembled portion between oil seal washer and the inner ring or core metal and the inner ring can be suppressed.Therefore, can obtain highly reliable Axle bearing system by the corrosion that guarantees the electric conductivity between outer ring and the inner ring and suppress those assembled portion.
Description of drawings
Fig. 1 is the sectional elevation figure according to the main portion of the Axle bearing system of embodiments of the invention 1.
Fig. 2 is the explanation view of the hermetic unit of Fig. 1.
Fig. 3 is the explanation view of the electric conductor of Fig. 2.
Fig. 4 is the explanation view of hermetic unit when bearing portions is installed on the hub spindle.
Fig. 5 (a) is the explanation view for the modification of the hermetic unit of embodiment 1, and Fig. 5 (b) is the explanation view for another modification of the hermetic unit of embodiment 1.
Fig. 6 is the explanation view of another modification of the hermetic unit of embodiment 1.
Fig. 7 is the sectional elevation figure according to the Axle bearing system of embodiments of the invention 2.
Fig. 8 is the explanation view of the conductive member of Fig. 7.
The specific embodiment
(embodiment 1)
Fig. 1 is the sectional elevation figure according to the main portion of the Axle bearing system of embodiments of the invention 1, and Fig. 2 is the enlarged view of the hermetic unit of Fig. 1.This embodiment comprises the bearing portions of inner ring rotation type.In the following description, the left side of each figure is called the inboard, and the right side is called the outside.
In the accompanying drawings, Reference numeral 1 indication Axle bearing system.Flange 3 with a plurality of bolts hole 4 is arranged on the periphery on the outside of the hub spindle of being made by steel 2, and the bolt (not shown) that is used for attached running vehicle wheel (not shown) is assemblied in the described bolt hole 4 by pressure.Cylindrical part 5 is arranged on the central part office of flange 3, and described cylindrical part 5 is outstanding to the inside, and the bearing portions 10 that will describe below has been installed on its periphery.Reference numeral 6 has been indicated through hole, and core and axle drive shaft that described through hole is arranged to axially to pass column part 5 are assemblied in the described through hole, and usually spline was arranged on the interior week of through hole.
Bearing portions 10 comprises: the inner ring of making by bearing steel material 11, and described inner ring 11 is divided into two parts, is provided with rolling surface (raceway face) on the inner ring 11 between the flank of the office, two ends that is formed on inner ring 11; The outer ring 12 of making by bearing steel, and be provided with two row rolling surfaces on the outer ring 12, with rolling surface corresponding to inner ring 11; With the conical roller of making by bearing steel material 13 as rolling element, described conical roller 13 remains in the bag of the retainer 14a, the 14b that are made by steel or resin material with roll mode individually, and described conical roller 13 is arranged as two row between the rolling surface of inner ring 11 and outer ring 12.In two divided portion of inner ring 11, a divided portion can integrally form with hub spindle 2, and another divided portion can form by member separately.
Reference numeral 20a, 20b have indicated hermetic unit, and described sealing annular opening portion is formed on the place, both sides of inner ring 11 and outer ring 12.As shown in Figure 2, hermetic unit 20a, 20b each by oil seal washer 21, core metal 22 and sealing member 23 are made, described oil seal washer 21 for example uses, and the metal sheet of stainless steel sheet is pressed into annular shape, described oil seal washer 21 has L shaped outer peripheral portion, and the cylindrical part 21b pressure of flinger 21 is assemblied on the periphery of an end sections of inner ring, make circumferential wall 22a axially outwards arrange, described core metal 22 uses the stainless steel sheet pressure of same type to be annular shape, described core metal 22 has inverted L shaped outer peripheral portion, and the cylindrical part 22b pressure of core metal 22 was assemblied in interior week of an end sections of outer ring 12, make circumferential wall 22a be arranged in the axial inboard of oil seal washer 21, and for example the sealing member of being made by non-conducting material of the fluorine sealing member of being made by viton 23 is attached to the circumferential wall 22a of core metal 22, described sealing member 23 is positioned at by in oil seal washer 21 and core metal 22 area surrounded, and the lip of described sealing member 23 contacts with oil seal washer 21 pressure.
The columniform substantially electric conductor of being made by for example conduction neoprene of NBR of conduction 24 is attached to the outer end portion of cylindrical part 22b of the core metal 22 of outer gland sealing part 20a.
For example, as shown in Figure 3, electric conductor 24 is made of attachment part 25, and described attachment part 25 is arranged on a side place, and has assembling groove 26 and the lip portion 27 that is arranged on the opposite side place on the cylindrical part 22b that snugly is assemblied in core metal 22.Lip portion 27 is divided into a plurality of capable parts of narrow tooth that are similar to comb.
Next the example of the assembling process of the Axle bearing system 1 that constructs with aforementioned manner will be described.
At first, when assembling comprises the bearing portions 10 of inner ring 11, outer ring 12 and conical roller 13, as shown in Figure 2, the hermetic unit 20a with electric conductor 24 is assemblied in the annular opening outer ring opening portion partly at the place, both sides that is formed on inner ring 11 and outer ring 12 by pressure.The hermetic unit 20b that does not have electric conductor 24 is assemblied in the interior annular opening part by pressure, has therefore constituted bearing portions 10.
Then, the inner ring 11 of the bearing portions 10 of Gou Chenging is assemblied in by pressure on the cylindrical part 5 of hub spindle 2 with the hermetic unit 20a that is arranged on the outside (flange portion 3 sides) from inboard like this, and the inner end portion of cylindrical part 5 is bent to clamp inner ring 11 (clamping part 7).So, axial force is applied to clamping part 7 and is arranged between the step part 8 on the outside, so bearing portions 10 is fixed to hub spindle 2.At this moment, as shown in Figure 4, the lip 27 of the electric conductor 24 of outer gland sealing part 20a is pressed against the wall surface of the flange portion 3 of hub spindle 2, and is bent then to contact with its pressure.
Bearing portions 10 hub spindle 2 disposed thereon in the above described manner integrally is fixed to the axle drive shaft (not shown), makes through hole 6 be assemblied on the axle drive shaft.Be arranged on flange portion 15 on the outer ring 12 of bearing portions 10 and be fixed to axle box etc. not rotating, and comprise that the hub spindle 2 of the inner ring 11 of axle drive shaft and bearing portions 10 is rotatably supported by conical roller 13.
In being attached to the Axle bearing system 1 of axle drive shaft, when axle drive shaft rotates, with hub spindle 2 and the inner ring 11 of bearing portions 10 and oil seal washer 21 rotations of hermetic unit 20a, 20b of axle drive shaft integration.
On the other hand, the outer ring 12 of bearing portions 10, the core metal 22 and the fluorine sealing member 23 that are attached to hermetic unit 20a, the 20b of corresponding core metal 22 do not rotate.The lip of fluorine sealing member 23 and 21 moving contacts of the oil seal washer of rotation are to seal annular opening portion.
At this moment, the electric conductor 24 that is arranged on core metal 22 places of hermetic unit 20a does not rotate yet, and the wall surface moving contact of the flange 3 of the hub spindle 2 of its lip portion 27 and rotation.
By the moving contact of lip portion 27 with the wall surface of flange 3, the electric conductivity between outer ring 12 and the inner ring 11 is guaranteed by core metal 22, electric conductor 24 and hub spindle 2, makes two circles all remain on identical potential level.Therefore, in outer ring 12, do not store static, and therefore do not generate spark.Also prevented that by hermetic unit 20a, 20b the muddy water that driving vehicle splashes from invading bearing portions 10 inside.
In addition, as the conductive path between inner ring and the outer ring, because fluorine sealing member 23 is nonconducting, so electric current can preferably be brought into hub spindle 2 (electric current can be brought core metal 22 into by electric conductor 24 from hub spindle 2) from core metal 22 by electric conductor 24.Therefore, because the conductivity of setting up by oil seal washer 21 is very little, so can suppress the corrosion of the assembled portion between oil seal washer 21 and the inner ring 11.
(modification of embodiment 1)
Fig. 5 and Fig. 6 show the explanation view of other example of the hermetic unit 20a of the bearing portions 10 of Axle bearing system 1 according to an embodiment of the invention.
Fig. 5 (a) shows modification, wherein the radially inner side of annular of being made by the conduction neoprene and the electric conductor 24 that launches is attached to the peripheral end part of oil seal washer 21, described oil seal washer 21 is fixed to the inner ring 11 of the hermetic unit 20a of bearing portions 10, and is arranged on the interior perimeter surface adjacency of lip portion 27 and the cylindrical part 22b of the core metal 22 that is fixed to outer ring 12 on the periphery of oil seal washer 21.In this case, core metal 22 need be formed by the metallic material of the steel plate that for example has electric conductivity.
Fig. 5 (b) shows another modification, wherein is attached to the outer peripheral portion of oil seal washer 21 by the radially inner side of the annular electric conductor 24 made of neoprene of conduction, and the outside end surfaces of the lip portion 27 of annular electric conductor 24 and outer ring 12.
Further, Fig. 6 shows another modification, wherein by the diameter of the radially inner side of the annular electric conductor 24 made of neoprene of conduction inside diameter greater than the cylindrical part 22b of core metal 22, the radially inner side of described annular electric conductor 24 is attached to the peripheral end part of oil seal washer 21, the lip portion 27 of described annular electric conductor 24 is a C shape shape by general curved, with with the interior perimeter surface adjacency of the cylindrical part 22b of core metal 22, and grease 28 is filled between the interior perimeter surface of cylindrical part 22b of the inboard of lip portion 27 and core metal 22.
The lip portion 27 of the electric conductor 24 of Fig. 5 and Fig. 6 do not need with core metal 22 or outer ring 12 along its whole circumference adjacency.For example, as shown in Figure 3, the narrow tooth that lip portion 27 can form comb is capable, with relevant portion adjacency discontinuously.Therefore, only lip portion 27 to small part must with the relevant portion adjacency, to set up conductivity.
In the situation of Fig. 5 (a) and Fig. 6, the outer ring 12 of bearing portions 10 and inner ring 11 are in conduction state by core metal 22, electric conductor 24 and oil seal washer 21.In the situation of Fig. 5 (b), outer ring 12 and inner ring 11 are in conduction state by electric conductor 24 and oil seal washer.Thus because outer ring 12 and inner ring 11 the two all remain identical potential level, so do not cause the situation of 12 stored static in the outer ring.
In the description of Fig. 5 (a), Fig. 5 (b), though electric conductor 24 is described as being arranged on the outer gland sealing part 20a, electric conductor 24 can be arranged on the interior hermetic unit 20b.
According to embodiment, the dust seal of repacking etc. must not be arranged in hermetic unit 20a, the 20b of the bearing portions 10 with nonconducting fluorine sealing member 23.Alternatively, the annular electric conductor 24 of setting up conductivity between outer ring 12 and inner ring 11 is arranged in the hermetic unit 20a, makes to be provided with conduction state between outer ring 12 and the inner ring 11, so that two circles are remained on identical potential level.Therefore,, also can be between outer ring 12 and inner ring 11 easily and in the mode of guaranteeing use simple structure to guarantee electric conductivity, thereby make and to prevent to store static even between bearing portions 10 and hub spindle 2, do not guarantee in the situation in sufficient space.
In addition, as the conductive path between inner ring and the outer ring because fluorine sealing member 23 is nonconducting, thus may set up from oil seal washer 21 by electric conductor 24 to the outer ring 12 conductivity (conductivity can be set up to oil seal washer 21 from the outer ring by electric conductor 24).Therefore, especially in the structure shown in Fig. 5 (b), because the conductivity of setting up by core metal 22 is very little, so can suppress the corrosion of the assembled portion between core metal 22 and the outer ring 12.
In the above description of making, though the hermetic unit 20 according to embodiment is described as using in the Axle bearing system 1 of the bearing portions 10 that comprises the inner ring rotation type, also can use in the Axle bearing system of the bearing portions that comprises the outer ring rotation type according to the hermetic unit 20 of embodiment.
(embodiment 2)
Fig. 7 is the section drawing according to the main portion of the Axle bearing system of embodiments of the invention 2, and Fig. 8 is the section drawing of the conductive member of Fig. 7.Fig. 7 shows axle drive shaft 35 and is fixedly fitted to state in the through hole 6 in the hub spindle 2.In the following description, the right side of each figure is called the inboard, and the left side is called the outside.Identical Reference numeral will give with Fig. 1 in similar part, to omit the repetition of identical description.
Reference numeral 30 has been indicated conductive member.As shown in Figure 8, by suppressing the metal sheet of iron plate for example or stainless steel sheet, conductive member 30 forms annular shape by cylindrical part 31 and flange portion 32, and described flange portion 32 is arranged on the periphery of cylindrical part 31.Annular and the electric conductor of being made by for example conduction neoprene of the NBR of conduction 24 that launch integrally is attached to flange portion 32.The internal diameter of cylindrical part 31 is the external diameter of the step part 36 of axle drive shaft 35 no better than.The external diameter of the lip portion 27 of electric conductor 24 forms no better than or slightly less than the external diameter of the outer ring 12 of bearing portions 10.Identical with embodiment 1, the narrow tooth that lip portion 27 forms comb is capable.
By the pressure assembling or by making lip portion 27 be arranged on the outside on the step part 36 that cylindrical part 31 is assemblied in axle drive shaft 35, fix the conductive member 30 of structure by the way by adhesives etc.
Then, the through hole 6 in the hub spindle 2 of Axle bearing system 1 is assemblied on the axle drive shaft 35 to be fixed on it.With this, the step part 36 of axle drive shaft 35 and clamping part 7 adjacency of hub spindle 2.The lip portion 27 of the electric conductor 24 of conductive member 30 is pressed against the inner end surface of the outer ring 12 of bearing portions 10.
In the embodiment that constructs by the way, the outer ring 12 of bearing portions 10 is fixed in the mode that is similar to embodiment 1, and hub spindle 2 and inner ring 11 driven shafts 35 driven in rotation.At this moment, the conductive member 30 that is installed on the step part 36 of axle drive shaft 35 also rotates, thereby is arranged on lip portion 27 rotations of the electric conductor 24 on the conductive member 30, simultaneously with the end face moving contact of outer ring 12.
By this structure, between outer ring 12 and inner ring 11, provide conduction state by conductive member 30, described conductive member 30 comprises electric conductor 24, axle drive shaft 35 and hub spindle 2, thereby, outer ring 12 is remained identical potential level with inner ring 11.Though conductive member 30 is described as being made by hard ware and conductive rubber, conductive rubber can directly be attached to axle drive shaft 35.
In this embodiment, also can realize with embodiment 1 in the advantage much at one that obtains.
In the above description, though the Axle bearing system 1 that the present invention is applied to be described in the drawings, the present invention is not restricted to this, and therefore the present invention also can be applicable to have the Axle bearing system of other structure.
Certainly, the present invention can use multiple mode to carry out and without departing from the spirit and scope of the present invention.Though describe the present invention in detail with reference to specific embodiment, the those skilled in the art in the field that the present invention was subordinate to be it is evident that and can carry out various substituting or modification to described embodiment, and without departing from the spirit and scope of the present invention or invention scope.
The present invention is based on the Japanese patent application of submitting on July 8th, 2008 (No.2008-177530), its content merges by reference at this.
Industrial applicibility
According to the present invention, the electric conductivity between outer ring and the inner ring can easily and in the mode of guaranteeing use simple structure to be guaranteed, thereby so that may obtain highly reliable bearing device for axle.
Description of reference numerals
1 bearing device for axle
2 hub spindles
3 flanges
5 cylindrical parts
6 through holes
10 bearing portions
11 inner rings
12 outer rings
13 conical rollers (rolling element)
20a, 20b hermetic unit
21 oil seal washers
22 core metals
23 fluorine sealing members
24 electric conductors
27 lip portion
30 conductive members
35 axle drive shafts
36 step parts

Claims (6)

1. Axle bearing system comprises:
Inner ring;
Outer ring, described outer ring form the annular opening part between described inner ring and described outer ring;
A plurality of rolling elements, described a plurality of rolling elements are inserted between described inner ring and the described outer ring;
Hermetic unit, described hermetic unit by be arranged on oil seal washer in the described annular opening part, be arranged on the core metal in the described annular opening part and be arranged on described oil seal washer and described core metal between non-conductive sealing member form; With
Electric conductor, described electric conductor are arranged in the described hermetic unit, so that the conduction state between described outer ring and the described inner ring to be provided.
2. Axle bearing according to claim 1 system,
Wherein said electric conductor forms cylinder form substantially, so that a side of described electric conductor is attached to the described core metal of described hermetic unit, and the opposite side of described electric conductor contact hub spindle.
3. Axle bearing according to claim 1 system,
Wherein said electric conductor forms annular shape substantially, so that the radially inner side of described electric conductor is attached to the described oil seal washer of described hermetic unit, and the radial outside of described electric conductor contacts the described core metal or the described outer ring of described hermetic unit.
4. Axle bearing system comprises:
Hub spindle;
Be attached to the bearing portions of described hub spindle, described bearing portions comprises:
Inner ring;
Outer ring, described outer ring form the annular opening part between described inner ring and described outer ring;
A plurality of rolling elements, described a plurality of rolling elements are inserted between described inner ring and the described outer ring; With
Hermetic unit, described hermetic unit by be arranged on oil seal washer in the described annular opening part, be arranged on the core metal in the described annular opening part and be arranged on described oil seal washer and described core metal between non-conductive sealing member form; With
Axle drive shaft, described axle drive shaft comprises annular conductive member, described annular conductive member contacts the described outer ring of described bearing portions, and described hub spindle is installed on the described annular conductive member.
5. Axle bearing according to claim 1 system,
Wherein said electric conductor is formed by the neoprene with electric conductivity.
6. Axle bearing according to claim 4 system,
Wherein said electric conductor is formed by the neoprene with electric conductivity.
CN200980126832.5A 2008-07-08 2009-07-07 Bearing device for axle Expired - Fee Related CN102089161B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410123001.5A CN103963567B (en) 2008-07-08 2009-07-07 Bearing device for axle

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008-177530 2008-07-08
JP2008177530A JP5515246B2 (en) 2008-07-08 2008-07-08 Axle bearing device
PCT/JP2009/062334 WO2010004975A1 (en) 2008-07-08 2009-07-07 Bearing device for axle

Related Child Applications (2)

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CN201410130835.9A Division CN103978837B (en) 2008-07-08 2009-07-07 Bearing device for axle
CN201410123001.5A Division CN103963567B (en) 2008-07-08 2009-07-07 Bearing device for axle

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CN102089161A true CN102089161A (en) 2011-06-08
CN102089161B CN102089161B (en) 2014-08-13

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CN200980126832.5A Expired - Fee Related CN102089161B (en) 2008-07-08 2009-07-07 Bearing device for axle
CN201410130835.9A Expired - Fee Related CN103978837B (en) 2008-07-08 2009-07-07 Bearing device for axle

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EP (1) EP2301766B1 (en)
JP (1) JP5515246B2 (en)
CN (3) CN103963567B (en)
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WO2010004975A1 (en) 2010-01-14
EP2301766B1 (en) 2014-05-14
CN103963567B (en) 2016-08-17
US20110129176A1 (en) 2011-06-02
CN103978837B (en) 2016-06-29
CN103963567A (en) 2014-08-06
JP2010018045A (en) 2010-01-28
EP2301766A4 (en) 2012-04-18
JP5515246B2 (en) 2014-06-11
CN103978837A (en) 2014-08-13
EP2301766A1 (en) 2011-03-30
CN102089161B (en) 2014-08-13
US8770848B2 (en) 2014-07-08

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